practice.key - July 9, 2001 Test 2 Gas cnst. R = 0.0821 =...

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2 Gas cnst. R = 0.0821 = 8.314 Specific heat of H O = 4.184 July 9, 2001 CHEM 1017 Name KEY Test 2 S. S. No. 1. On a warm summer day last year (37°C , 775 mm Hg), I took my grandson to a circus where a clown was passing out nice sized (4L) helium filled balloons. How many helium atoms did the clown put in my grandson’s balloon? a. 1.18 x 10 3 b. 0.163 c.* 9.81 x 10 22 d. 6.02 x 10 23 e. 22.4 PV = nRT 2. Which of the following chemical reactions can be used for the laboratory preparation of carbon dioxide gas? a. reaction of an acid with a base b. thermal decomposition of potassium chlorate c. reaction of zinc metal with aqueous hydrochloric acid d. the reaction of nitric acid with silver perchlorate e.* the reaction of sodium carbonate with aqueous sulfuric acid 2 3 24 2 2 Na CO + H SO 6 Na SO + CO + H O 3. What is the oxidation number of nitrogen in the nitrate ion? a. -1 b. +3 c. +6 oxidation no. = +5 d. -5 e.* none of the above 4. If the following ions are mixed together in an aqueous solution, 43 4 4 Cs , NH , K , Ba , NO , OH , SO , ClO , and Br , ++ + 2 +- -2 - - - which compound is likely to precipitate from solution?
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practice.key - July 9, 2001 Test 2 Gas cnst. R = 0.0821 =...

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